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Executive Summary Significant Results And Assorted Tests And Procedures For Reflective Raised Pavement Markers
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Book Synopsis Executive Summary, Significant Results and Assorted Tests and Procedures for Reflective Raised Pavement Markers by : R. W. McNees
Download or read book Executive Summary, Significant Results and Assorted Tests and Procedures for Reflective Raised Pavement Markers written by R. W. McNees and published by . This book was released on 1984 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Executive Summary, Significant Results and Assorted Tests and Procedures for Reflective Raised Pavement Markers by : Roger W. McNees
Download or read book Executive Summary, Significant Results and Assorted Tests and Procedures for Reflective Raised Pavement Markers written by Roger W. McNees and published by . This book was released on 1986 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis State-of-the-art and Objectives of Reflective Raised Pavement Markers by : Roger W. McNees
Download or read book State-of-the-art and Objectives of Reflective Raised Pavement Markers written by Roger W. McNees and published by . This book was released on 1986 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reflectivity Retention of Reflective Raised Pavement Markers by : Roger W. McNees
Download or read book Reflectivity Retention of Reflective Raised Pavement Markers written by Roger W. McNees and published by . This book was released on 1986 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spacing of Raised Reflective Pavement Markers by : Judson S. Matthias
Download or read book Spacing of Raised Reflective Pavement Markers written by Judson S. Matthias and published by . This book was released on 1988 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis HRIS Abstracts by : National Research Council (U.S.). Highway Research Board
Download or read book HRIS Abstracts written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1987 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Texas State Documents written by and published by . This book was released on 1987 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Checklist of State Publications by : Library of Congress. Exchange and Gift Division
Download or read book Monthly Checklist of State Publications written by Library of Congress. Exchange and Gift Division and published by . This book was released on 1987 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: June and Dec. issues contain listings of periodicals.
Author :University of California, Berkeley. Institute of Transportation Studies. Library Publisher : ISBN 13 : Total Pages :468 pages Book Rating :4.F/5 ( download)
Book Synopsis Recent Transportation Literature for Planning and Engineering Librarians by : University of California, Berkeley. Institute of Transportation Studies. Library
Download or read book Recent Transportation Literature for Planning and Engineering Librarians written by University of California, Berkeley. Institute of Transportation Studies. Library and published by . This book was released on 1987 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1987-04 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1987 with total page 1440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wet Night Visibility of Pavement Markings by : Ronald Bruce Gibbons
Download or read book Wet Night Visibility of Pavement Markings written by Ronald Bruce Gibbons and published by . This book was released on 2004 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This executive summary describes an investigation into the performance of pavement markings in wet night conditions. The performance of a typical pavement marking will degrade when it gets wet. This is a result of the flooding of the marking optics, thereby reducing retroreflectivity. Several technologies are available to improve wet marking performance. In this project, six technologies were tested using both standard measurement methods and participant evaluations. The results show that two of the marking technologies, raised retroreflective markers and wet retroreflective tape, outperformed the group under all conditions. These markings were also highly accepted by the participants. The results also show that the standard paint and glass beads technology is the worst performing and the least desirable of those evaluated. A comparison of the ASTM retroreflectivity measurement methods and the measured luminance results also indicates that the methods are suitable for the conditions used in the evaluation; however, possible additions and corrections to the methods are outlined in this report. A follow-up study is underway to allow development of a performance-based specification for pavement markings for wet night visibility.
Book Synopsis Texas Transportation Researcher by :
Download or read book Texas Transportation Researcher written by and published by . This book was released on 1978 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Texas State Documents Index written by and published by . This book was released on 1987 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Public Administration Series--Bibliography by :
Download or read book Public Administration Series--Bibliography written by and published by . This book was released on 1987 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Using Finite Element Analysis of Retroreflective Raised Pavement Markers to Recommend Testing Procedures for Simulating Their Field Performance by : Ravi Prakash Agrawal
Download or read book Using Finite Element Analysis of Retroreflective Raised Pavement Markers to Recommend Testing Procedures for Simulating Their Field Performance written by Ravi Prakash Agrawal and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Retroreflective Raised Pavement Markers (RRPMs) supplement other pavement markings to provide guidance to road users. Previous research concerning durability of the RRPMs suggests that their performance has been degrading over the years. One of the main causes for underperformance of the RRPMs is the lack of appropriate laboratory testing standards that can test the adequacy of the RRPMs to perform in field conditions. There is a need to modify the existing standards or develop new testing procedures that can better simulate field conditions. This requires identifying critical locations and magnitudes of stresses inside the markers during the tire-marker impacts that happen on roads. The goal of this research was to identify critical magnitudes and locations of the stresses in RRPMs during the tire-marker impacts by doing the finite element modeling and simulation of the impacts, and use the information to recommend laboratory testing procedures that could simulate real-world conditions. The researcher modeled and simulated the tire-marker impacts using the finite element tools Hypermesh and LS-DYNA. He calibrated the material properties of the marker models to improve the tire-marker model. Based on the tire-marker impact simulations, the researcher concluded that the critical compressive stresses during impacts are located at the edge contacts of retroreflective sides with the top surface. The critical stresses may also occur at lower and upper corners of the marker. The other areas, especially the lower half of the marker, had tensile stresses. Angle of impact was found to be a critical external variable that affected the stresses inside the markers and the marker-pavement interface forces. The researcher then modeled and simulated a few laboratory-testing procedures that could simulate the field performance of the RRPMs. Based on these simulations, the researcher recommended that the ASTM compression test for evaluation of RRPMs be continued or a similar test be developed. He suggested development of one new test (named as offset compression test) that could better replicate the field conditions. He also recommended having a review of the ASTM flexural test.
Book Synopsis Development of Measures to Improve Field Performance of Retroreflective Raised Pavement Markers by :
Download or read book Development of Measures to Improve Field Performance of Retroreflective Raised Pavement Markers written by and published by . This book was released on 2009 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: Retroreflective raised pavement markers (RRPMs) are routinely used in Texas to supplement highway pavement markings. In recent years, problems of marker failure such as poor retention on pavements, physical damage, and loss of retroreflectivity are common. All marker models used in Texas meet the requirements set by American Society of Testing and Materials (ASTM) specifications. However, their performance varies significantly. The results from existing testing methods also do not correlate with field performance. It is therefore critical to identify or develop new lab testing methods that can accurately predict marker performance in the field. This report presents the research conducted over the three-year period to develop new lab tests that can predict marker field performance. Four field test decks were installed and monitored. Retroreflectivity and physical condition data were collected on six selected RRPM models at four deck locations that were selected based on traffic condition, pavement surface type, geographic and other environmental factors. Currently recommended ASTM tests, modified ASTM tests, and other new lab tests were conducted. Finite element modeling (FEM) of RRPMs under tire-marker impact and lab setting testing was also conducted. The marker performances from the test decks, under lab tests, and in simulation are compared. Based on the results of comparisons, a new lab test that best correlates with the field performance of the RRPMs is recommended.
